Articulator



April 30, 1929. w. M. GAMBILL 1,711,019

- J9 l ATTORNEY. .i

April 30, 1929- w. M. GAMBILL 1,711,019

ARTICULATOR l Filed oct. 14, 1927 s sheets-sheet 3 F593. 33 ""3 6.7 4,TM,

t U1 To 9 97 7 9.5 7a 7 23 93 |94 5 z2 zz Z? 30 30 irs-:x 279 30 30 II-l10 if l l 5 i" 1 Il r L 10- 7 V 8 10 217 2 .I l l J9 si? n 83 Il 63@Einf 3l @UY/l. l x/gg a a9 INVENTQR Wlllla//p/II. GamzbzlbJ Jos 10 BY lATTORNEY.

Patented Apr. 30, 1929.,

WILLIAM M. GAMBILL, or BOWLING GREEN, onlo.

ARTICULATOB.

Application mea october 14, 1927. ser1a1r'.\22s,17a.

This invention relates to a dental articulntor, and has for its oluectto provide. 1n n nnlnner as hereinafter lorth, an articulotor otl theelnss referred to, withndiinslinible menus ior etlieiently grinding inthe toet 1 to obtain n satisfactory occlusion for 'producingr undperfecting the individual three point Contact, the rotation point. theinward slant, the downward slant, und the incisul slant on the oi clusulsurfaces ot' the teeth.

A further object ot the invention is to provide1 in .1 manner ashereinafter set forth, nin urticulntor having means to provide,coinhined oscillatory und vertical movements, during the grinding notionund further with menus tor liroviding a retrnded :1nd 11 protruded bite.

it further object of the invention. is to provide. in :t inunner eshereinutter 'toi-th. n dentnl urticulntor for prrulueingr retruded und1protruded movements und vturther with ineens for adjusting the retrudedund protruded bites.

A further object of the invention to provide. in n manner hereinuft'tersetforth, a dentul nrticulntor with n oondyle shaft and n new und novelmeans for adjusting;r the position ot such shntt.

A further obieot of the invention is to pio vide. in u manner ashereinafter set forth. n. dentnl urticulntor with n. new und novel forniot iucisul pin unit `ot the revolvingr type und having use part thereofdriven means tor bodily revolving the unit and tor verticallyfuliustinnf the unit. i Further objects of the invention are to nrovide. in n. manner ns hereinafter set forth. n dental `irtieulntor.which is comparatively simple in its construction und arrangement,.stronon durable. adjustable. thormirrhlji7 elli @entend convenient inits use rendilv coupled with :i d rivino menus therefor. undeomnurffitivelv inexpensive to manufacture. n lilith the foregoingr undother objects in view the invention consists of the novel construction.combination und arrangement of ports :is hereinafter more specificallydescribed. und illustrated in the uecompnnymfr drnwines, wherein isshown un embodimentet' the invention. but it is to be understood thatChanges, vsrintionsund inodijtientions c1111 be resorted to which tollwithin the scope ot the claims hereunto uunended.

Inthe drowings wherein like reference ehu 1"- out` the several views: i

. Figure 1 1s a slde elevation of a dental arueters denote correspondingpnrtsthroughtieuiator. in accordance `with thisnvention.

Figure 2 is :i top plan view thereof.

Figure 3 is e cross sectional view thereof. Figure el: is :i section online 4 4; Figure 3. Figure 5 is a section on line 5 5 Figure 4.

Figure 5j is o view sfhnilafr to Figure 5 with v the adyistmg sorewsbooked away from the Referring to the drawingsindetail 1 generiillyindio-etes the buse or stntionaryilower how und 2 generally indicatesthe pivoted or oscillatory uppenbow.,` The base 1 has` its forwardportion `3 ot materially less height thanv the remaining portion` .4thereof-` The upper, foce of the forward portion is 1arranged below theupper `face of the remaining portion 4 of the base. The forward Dorftion `otfhelmiso is bifnrouted to "provide a pair of arms 5,16 arrangedin spaced relation onddisposed longitudinally.. `The arms 5. 6 arearranged below the tonof the portion 4 ot' thevbase. The portion 4 otthe base is provided `with thickened ports 7,8 nt the rear thereof onda`thickened part 9 ntfthe front thereof. `The portion 4 ot' the bese `issub#` fstnntially triangular in plan and the portion 3 reotnngulnr. The`thickened ports 7, 8 ure positioned at each rear corner of the portiont ot the base nndthe lutter :iteateh rear comen 1s provided with nVeountersunk opening;r 10 und the said. openings 10 extend tln'ough .theV

ports 7. S. The thickened partQis provided with n. depending: nin 11`towhich is attached n resilientenp or foot piece 12. y

lvlountedupon the portion `4|. of thebasel,

:it each renrcOrner of the latter, is instandnrdand the seid standardsare generally in`- dieated at 13. 14. As each `osaid standards is of thesome construction, but one Willbe described .fis the description ofonewill apply to the other. `The standards `are fixedly se cured to therear of the base 1 and when connected therewith are oppositely disposedrelative to eachother. Each et said standards includes a circular basehaving formed integral with the lower face ther-eet' a depending' armtermed ot a circular upper portion 16, a peripheralljT threadedcylindrical portion 17 of less diameter than the portion 1G and a. lowercylindrical portion 18 of less diameter than the intermediate portion17. ri'ihe portion 16 is integral with the lower tace ot the base 15. Aresilient cap or foot piece is mounted on the lower portion 18 and saidtoot piece is indicated at 19. The depending arm extends through theopening 1() and has its upper portion 16 thereof sea-ted in that part oflarger diameter' ot the opening 10. The intermediate portion 17 of thearm projects a substantial distance below a thickened part 7 or 8 and`cari'lies a clamping nut 21 which is adapted to abut against athickened part 7 or 8 and in connection with the upper portion 16 oitthe arin tixedly secures or clamps the standard to the base. Eachstandard further includes a tapered upright 21 terminating at its upperend in a quadrant shaped member 22 et greater thickness than thethickness of theupright and formed integral with the outer tace of themember 22 is a circular head 23 provided in proximitj.T to its edge'with an arcuate slot 211 having its inner face provided With a quadrantshaped member 25 opposing the member 22. The 'members 22, 25 aredisposed diagonally With respect tothe inner tace ot the Ahead 23. Thehead 23, axially thereof, is formed with an opening 26, Extendingthrough the upright 21 and arranged one above the other and in' suitablespaeed relation is a pair of headed bolts 275 2S having their headsspaced from the inner Jace of the upright. The bolts 27, 28 carrysecuring nuts 2S) which abut against the outer face ot the upright.Mounted on the bolts Q7, 2S and interposed between the upright 2l andthe'hcads 30 of the bolts are spacing collars 31 o materially lesslength than the length ot the bolts and which are maintained in spacedrelation with respect to the heads b v a holding spring 32 ot the straptype and which is bent to extend around the rear ot the bolt E28 andforwardly of the bolt E27 and Aturthfn' is of a length to extend abovethe opening QG and lif'ormed with a hoop-shaped upper tern'iinal portion33. The purpose of the springl 32 Will be hereinafter referred to.

Y Arranged againsttl'ie inner tace of each hea d is an adjustable holderfor the outer end ot a condyle shaflt section and the said `holders aregenerally indicated at 34, 35.

Each holder extends dian'ietrically of a head 23 and is positionedbetween the members 22, 25.

As the holders 34, 35 are of the same con` struction, but one will bedescribed as the description ot one will apply to the other. Aflach oitsaid holders comprises an oblong body portion 36 'termed with alengthwise extending groove 37' and a pair et openings 38, 39 which arepositioned axially oit and at the ends ot the body portion andcommunicate with the groove 37. rlhe wall ot each of said openings isthreaded. Formed integral with the outer side ot the body portion 3Ga`Centrally thereot, is a perijiherally threaded stem Ll0 which projectsthrough the opening 2G and carries a clamping nut il adapted to abutagainst the outer face ot the head 23 for the purpose ot clamping theholder in sel position.` The groove C37 opens at the inner side of. thebody portion 3G. Formed intogral with the outer side ot' the bodyportion 8G, and operating' in the slot :24 is a pointer 49, Whichassociates with a set et grachuttions 43 'Formed on the outer tace oftthe head QS, adjacent the slot 2l. The pointer7 in connection With thescale or graduations 413 enables one to ascertain the setting or ratheradjusting of the holder to the desired angular position thereoil' withrespect to the head 5225. The nut l,l1 when loosened permits of shiftingthe holder to the position desired, and a'lter which the nut 411 isscrewed home and the holder maintained in its adjusted position. j

l`hreadedljr engaging with the walls ot the openings l., 39 are a pairof oppositely extending adjusting members L.lli having' heads e5 andeach ot *which carries` a. lockrnut Li6 adapted to aluit against an endot' the body` portion 36 tor locking' the adjusting meniber in adjustedposition. The adjusting incinbers 4 4. when set do not loch the condyleshaft from performing an oscilhrtorjf function, as a 'ter the sha' 'sadjufsted theadjusting incinbers hat Led a "ay tl'lerelfroin. ffice Figure l, under such coiulitions the oscillation ot the upper hou' is notpriu'ented. The adjusting` members i-1 extend in the sanioplane and areopposit ij' disposed. The inner ends of the adj1 Ating members arearranged in spaced relation. The adjusting members are provided 't'orangularly adju... ig a condyle shat'i, to be presently relier-rml tinand said sha'tt is 'formed ot' a pair of serlions. Av pair ot adjustingmembers 1s associated With each shaft section.

The os illatory bow 2 istornwd of an upper and a lower section eti', 4S,respectivelyA dctachahlpv secured together bv hold't'ast devices 49. Thefor iard ends of the sections L1:7, itl are substantially circular incontour and are indicated at 50. lVith reference to Figure f) whichillustrates the inner or lower :tace of the section L11, it is termedwith a circular recess 51, a semi-circular recess 52 which communicateswith the recess 51, and a longitudinally extending semi-circular groove53 which is intersected bv the recess 52. The groove 53 is of less Widththan the recess 52.

ill)

tl l) The recesses 51 and 52 and groove 53 are formed in the end portion50. The inner face of the section 47 is further formed intermediate itsends with a concavity 54 and a rib 55 extending lengthwise of anddisposed centrally of the concavity 54. The section 47 has a pair ofsockets 56 Which are formed in the rib 55 and have the Walls thereofthreaded. The rear end ot' the section 47, at one side, isA providedwith an extension 57,` and the inner face ot' said rear end is providedwith a semi-circular recess 58 and a semicircular groove 59 of Ylesslength and of less width than the lengt-h and width of the recess 58.The groove 59 is formed in `the extension 57 and communicates with therecess 58 and the latter has a port-ion thereof in the extension 57. Therear end of the" section 47 is provided with a socket 60 having athreaded wall. The holdfast devices 49 threadedly engage with the wallsof the sockets56 and 60. The section 47 is furthermore provided with anopening 61 of greater diameter than the socket 56 and said opening 61 isarranged in proximity to the rear socket 56.

Vith reference to Figure 8, which shows the upper or inner face of thesection 48 of the oscillatory bow, the end portion 5I is provided with acircular recess 62 which coinmunicates with a semicircular recess 63 andsaid end portion 51 is furthermore provided with a lengthwise extendingsemi-circular groove 64 which is intersected by the recess 63.y rPhegroove 64 is of less width than the width of the recess" 63. 'Thesection 48 has its inner face formed with a concavity 65 and the latteris positioned between the ends of said section. Extending lengthwise ofthe concavity as well as centrally thereof,` is a rib 66. The section 48is provided with openings 67 arranged in spaced relation and whichextend through the rile 66. The section 48 is furthermore provided withspaced openings 68 which extend through the" rih 66 and is also formedwith an opening 69 of greater diameter than the opening 68 and saidopening 69 extends through the rib 66. The seetion 48 has its innerface, at the rear thereof, formed with a semi-circular recess 70 and asemicircular groove 71 at one end of the recess 70 and of less widththan the width of said recess. The grooves 53 and 59 formed in thesection 47 are arranged in alignment and the recesses 52, 58 of thesection 47 are also arranged in alignment. The recesses 63 and 70 formedin the section 48 are arranged in alignment and the grooves 64 and 71 ofsaid section are arranged in alignment.

l/Vith reference to Figure 7 the section 47, at the end portion 50thereof is provided with a vertical opening 72 which communicates withthe recess 51; The section 48 at the end ortion is formed with avertical opening 3 which communicates with the recess 62. The section 48is `furthermore provided with a `dependingsleeve 74 having its innerfacefiush with the wall of the opening 73. The opening 72 is of lessdiameter than the recess 51 "and the opening` is of less diameter thanthe recess 62; `When thesec-l tions w47 and'148 are secured together,the` recesses 51, 62 "registerfthe recesses 52, 63 register, the igrooves 53, 64H1'egister,` the i sockets 56, 60 registerwith theopenings 67,

portion 76 provided witha pair of oppositely disposed tubular arms77,78" and each of` which at its topis providedWit-h a. verticallydisposed opening 79 carrying a`` set screw 80 for a purpose tobepresently referred to.

Extending through thebearing 75, recesses 51,` 62, opening 72 andextending asubstantial distance above the section 47 is a verticallydisposed rotatable shaft` 81 which forms a part of the ineisal pinnnit.-` "The upper part of the shaft `81 is peripherally threaded as at82. Carried the sh`aft`81 and mounted in the opening`72` isv a collar 88and secured to theshaft 81 andoperating in the registering recesses 51,62 is a worm pinion 84 of greater `diarrie't'er than' the collar 88.`Engaging with theupperend of the shaft 81 is a claniping nut 85 whichcoacts with the section 47 and collar 83, asfivell as the wornr pinion84, toprvent thehodilv shifting in an upward directionofthe shaft 81.Secured to thelower end of the shaft 81 is a coupling" member 86 andwhich is bodily carried hy said shaft. Formed integral with the lowerend of the coupling inelnloer` 86, and disposed at right angles withrespect thereto, as well as lieing positioned to one side of the axis ofthe shaft 81, is a cani niei'nher' 87 coacting `with anV incisal unit`guide, tol he presently referred to, forthe purpose of inilfiartingoscillatory and vertical movements to the upper bow 2 on the operationof the shaft 8 L The driving nieansfor the shaft 81 `coinprises anoperating shaft 88 carrying a tubular bearing 89 which is seated in theregistering recesses 58 and'70. Theshaft 88 further carries a tubularmember` 90pprovided with a worm 91 Whichmeshes with the pinion 84. u

The tubular member 90`is` seated in the yregistering grooves 53, 64 andthe worm91f`is positioned in the registering `recesses 52, `63. The rearend of the shaft 88 has connected therewith a Hexi'ble shafting 92`Whichis operated from a prime mover;

The rear end of the oscillatory bow` 2 is supported by an angularlyadjustable edndyle shaft formed of two sections 93, 94 and with theformer having its inner end pro vided with a socket 95 formed with athreaded Wall and with the latter having its inner end provided with areduced peripherally threaded extension which adjustably engages thewall of the socket thereby permitting of the lengthwise adjusting of theshaft.` The sections 93, 911 are mounted in the arms 77, 78 and projectfrom the outer ends of said arms; The sections 93,94 are securedstationary to the arms 77, 78 by the set screws 80. That part of each ofthe shaft sections which is mounted in an arm 77 or 78 is of greaterdiameter than the portions of said sections which project from said armsand the outer portions of said shaft sections are indicated at 97 andeach has the outer free terminus thereof of globular form as indi catedat 98. The hooleshaped upper ends 33 of the springs overlap the reducedouter `portions of the shaft sections 93, 94 and the angular adjustmentof the condyle shaft is had against the action of the springs 32. Theshaft sections 93, 941 extend into the grooves 37 of the holders 34, 35and the globular outer end 98 of the section 93 is positioned between`the opposed ends of the adjusting members of the holder 34 and theglobular outer end of the shaft section 94 is positioned and oscillatesbetween the opposed inner ends `of the adjusting members of the holder35.

The angular adjustment of the condyle shaft provides for the angularadjustment of the oscillatoryupper bow in a horizontal direction. Thecondyle shaftcan also be adjusted vertically or upwardly or downwardlydepending,r upon the position of the holders 34, 35 with respect to theinner faces of the heads 23 of the standards wherefore the upper bow canbe adjusted angularly in a horizontal direction and upwardly anddownwardly when desired at an inclination.

The guide unit for the incisal point unit consists of a V-shaped trough99, which is closed at one end as at 100 and the said closed end 100 isformed with an opening 101, having a threaded wall. The trough 99 ismounted upon the arms 5 and 6 of the part 3 of the Abase 1. The trough99 has a depending' arm 10Q, formed with a socket 103 provided with athreaded wall and engaging,r with said wall is a headed securing member'l0-f1 adapted to abut against the lower faces of the arms 5, 0 for thepurpose of maintaining` the trough 99 in adjusted position, as saidtrough 99 can be shifted lengthwise with respect to the por tion 3 ofthe base 1. 'lhreadedly engaging with the wall of the opening 101 is anadjusting member 104, which coacts with the free end of the cam 87 foradjustably produeingthe protruded movements of bites.

Secured to the lower face of the upperbow 2 and to the upper face of thebase 1 are mono plates 105, 106 respectively. The plate 105 is securedagainst the lower face of the how 2, by a clamping member 106', whichextends through the registering' openings 01. and 69 and has threadedengagement with the plate 105. bettingjlr lugs 107 are carried by theplate 105 and seat in the openings 08. The plate 106 is secured to theportion L1 of the base 1 by an upstanding chunpiiuir member 108 which atits upper end has threaded engagement with said plate 106. Setting lugs109 are carried by the plate 106 and which seat in openings 110 formedat t-he top of the portion el. of the base 1. i

TWhen the condyle shaft section 93 is ann'ularly adjusted horizontallyin av forward direction the shaft section 941 shifted rearwardly, due tothe fact that the shaft sections are coupled together, and when theshaft section 9st is adjusted forwardly the shaft section 93 is shiftedrearwardly. The j shaft sections can also be adjusted upwardly due tothe positioning of the globular ends thereof between the adjustinglmembers, as these latter can be positioned upwardly or dmvnwardly andafter so positioned the ad justine' members can be shifted to move theshaft sections upwardly or downwardly. The adjustment of the shaftsections horizontally, upwardly or downwardly is had through the mediumof the adjusting mem bers carried by the holders.

The condyle shaft sections form. bodily shi ftable pivots for the upperbow 2, and the springs bearing' on the shaft sections actto t in theoscillatory movements to the bow 2 as such springs will natiui'allytendto lower the forward end of such bow.

heferrinig to Figure 'l0 the rotary shaft of the ineisal pin unit isindicated at 111 and is forn'ied with a bevelled lower terminal portion1.12, and the latter in cross section is segmental in contour andgradually increasing.,r in cross sectional area from its lower to itsupper end. That part of the shaft 111 from the upper end of the portion112. is of cylin drical cross section thrmurhout. The upper part of theshaft 111 is constructed similar to the upper part of the shaft 81. Thepart 112 of the shaft 111 operates i n the trough 99 and the adjusting'member 101 associates therewith. The adjusting member 104 carries a locknut 105.

.1n articulator, constructed in accordance with this invention, providesan efficient means for grinding in the teeth to obtain a thoroughsatisfactory occlusion for producing' and perfecting the individualthree point contact, the rotation point, the inward slant, the downwardslant and the incisal slant on the occlusal surfaces of the teeth,therefore A it 1s thought the many advantages of an arloo llll

Stood that changes in the details of construction can be had which .tallWithin the scope of the invention as claimed. i

l, In a dental articulator a condyle shaft adapted to be connected toand provide a pivot for the oscillatory upper bow of the articuiator, apair of spaced standards each formed with a stationary head, `a pair ofholders adjustable Aon a horizontal axis, each positioned against theinner face of and supported from a head and carrying means for ixedlysecuring it in adjusted position, said shaft having its ends extendinginto `said holders, and a pair of oppositely extending adjusting memberscarried by each holder and having their inner ends abutting an end ofthe shaft tor angularly adjusting the latter when said members areadjusted.

2. In a dental articulator a condyleshaft adapted to be connected to andprovide a pivot for the oscillatory upper bow of the articulator, a pairof spaced standards each formed With a stationary head,a pair of holdersadjustable on a horizontalV axis, each posi tioned against the `innerface of and sup ported from a head and carrying means fortixedlysecuring it in adjusted position, said shaft havingits endsextending intosaid holders, anda pair of oppositely extendingr adjustingmembers carried by each holder and having their inner ends abutting an`end of the shait for `angularly adjusting the latter when saidmembersare adjusted, said members having threaded engagement With saidholdersand each member provided vvith a lock nut for-.locking it in setposition.

3. In a dentalarticulator of that type including an oscillatory upperbow, an aiiguf larly and lengthwise adjustable condyle shaft adapted tohe connected to` and provide a pivot for said upper bow, a pair ofstandards each provided with a head piece, a pair of holders adjustableonta horizontalaxls, each holder positioned against the inner tace ofand supported from a head and carrying means for lixedlysecuring it inadjusted position, said holders extendingdialnetrically oif the inner'faee of said head, said shafts having' globular ends `extendingiintosaid holders,` and a pair of oppositely disposed adjusting memberscarried by each holderandihaving their inner ends abutting a globularend of said shafts for angularly adjusting the latter when the membersare adjusted.

`4. In adental articulator of that type including an oscillatory upperbow, an yangulariy and lengthwise adjustable condyleshaft adapted to beconnected `to and provide "a pivot tor said upper boW,a pair ofstandards each `provided with a head piece, `apair of holders adjustableon a horizontal axis, each holder positioned against the innergface ofand supported from a head and `carrying meansfor ixedly securing itinadjusted position, said holders extending diametrically o't the innerface of said head, said shafts having globular ends extending `intosaid5. In a dental articulator a condyle shaft adapted to `be connected toand provide a pivot for the oscillatory upper bow of the articulator, apairof spaced standardseach formed `with a stationary head,` a pair otholders adjustable on a horizontal axis, each j positioned against theinner face of and.` supportedfrom a head ang carryinggmeans for fixedlysecuring it in a i justed position, said shaft having its ends extendingintosaid holders, a pair of oppositely extending fadjusting memberscarried by each holder and having their inner ends abutting an end `otthe shaftifor angularly adjusting the latter Whensaid members areadjusted, and said holders and heads havingcoacting means to indieatetheadjust-ment of the holders.

6. In a dental articulator afcondyle shaft adapted to he connected to`and provide a` pivot for the oscillatoryupper bow of the articulator, apair-of spaced standards each formed with `a stationary head, a pair ofholders adjustable on a horizontalaxiswach positioned against the innerfaceiof and sup.-` 1

portedfrom a head and carrying means `for ixedly securing 1t 1n adjustedposition, said shaft havingits ends extending.intoisaid` holders, a pairof oppositely extending adjusting meniliiers carried by leach holder andhaving theirinneriends abutting an end of theshaft torangularlyiadjusting thelatter i when said `members are adjusted,saidmeinbers having threaded `engagement `with said holders andeaehnmemberprovided with a lock nut for lockingit inset position, and saidholders `and heads having coaeting means to indicate the adjustment ofthe holder. j JT. In a dental articulator of that typelin` cluding anoscillatory upperbow, an angu-` ina larlygandl lengthwise adjustablecondyle shaft adapted to be connectedito and providewa `pivot for saidupperfbow, apair of standards each provided `with a `head piena a pairof holders adjustable one horizontal axis, .each` holder positionedagainst the innerlface of and supported from akhead andicarrying meansfor ixe'dly securing itjinadjusted pof sition, said holders `extendingdiametrically ofwtheuinner faceof said head, said shafts `havingglobular ends extending into said adjusting `members carried `.byl 1.each `holder holders, and a pairof oppositelydisposed and having theirinner ends abutting a globular endof said shafts for angularly adjustingthe latter When the members are adjusted, said holders and heads havingcoacting means to indicate the adjustment of the holders.

8. In a dental articulator of that type including an oscillatory upperbow, an angularly and lengthwise adjustable condyle shalt adapted to be`connected to and provide a pivot for said upper bow, a pair ol standardseach provided With a head piece, a pair of holders adjustable on ahorizontal anis, each holder positioned against the inner face ot andsupported from a head and carrying means for tixedly securing it inadjusted position. said Yholders extending diametrically ol the innerlace of said head, said shafts haviiig globular ends extending into saidholders, and a pairwof: oppositely disposed adjusting members carried byeach holder and-having their inner ends abutting a. globular end of saidshafts for angularly adj listing the latter When the members areadjusted,- said holders being grooved for the reception of the ends ofsaid shafts, `each of said adjusting members provided with a loch nutfor looking it in set position, and said holders and heads havingcoaoting means to indicate the adjustment of the` holders.

9. In a dental articulator a condyle shatt adapted to be connected toand provide a pivot for the oscillatory upper bou' ot the articulator, apair of spaced standards each formed With a'stationary head, a pair ofholders adjustable on a horizontal axis, each positioned against theinner face of and supported from a head and carrying means for lixedlysecuring it in `adjusted posit-ion, said shaft having its ends extendinginto said holders, and a pair of oppositely extending adjusting memberscarried by each holder and having their inner ends alnitting` an end ofthe shalt for angularly adjusting the latter when said members areadjusted, each oi said heads provided With an arcuate slot and agraduated scaleon its outer face adjacent the slot, and each oi saidholders provided with -a pointer extending through a slot and associatedwith `ascale to indicate the adjustment of' the holder.

i 10. In a dental articulator a condyle shaft adapted to beV connectedto and provide a pivot for the oscillatory upper boaT of thearticulator, a pair of spaced standardseach formed Witha stationaryhead, a pair of holders adjustable on a horizontal axis, each positionedagainst the inner tace of and supported from a head and carrying Vmeansfor iixedly securing it in adjusted position, said Vshaft having itsends extending into `said holders, anda pair` of oppositely extendingadjusting members carried by each holder and'havlng their inner endsabutting' an end Vof the shaft for `angularly adjusting the latter whensaid members are adjusted, said members having threaded engagement withsaid holders and each member provided with a lock nut for locking it iuset position, each of said heads provided with an arcuate slot andagraduated scale on its outer face adjacent the slot, and each oi' saidholders provided With a pointer extending through a slot and associatedwith a scale to indicate the adjustment of the holder.

11. In a dental articulator of that type including an oscillatory upperbow, an angularly and lengthwise adjustable condyle shaft adapted to beconnected to and provide a pivot lor said upper bow, a pair oitstandards each provided ivitha head piece, a pair et holders adjustableon a horizontal anis, cach holder positioned against the inner `tace otand supported from a head and carrying means lor iixedlysecuring it inadjusted position, saidholders extending diainetrically oi the innertace of said head, said shafts having globular ends extending into saidholders, and a pair ot oppositely disposed adjusting members carried byeach holder and having their inner ends abutting a globular end or' saidsha1-'t Vfor angularly adjusting the latter when the members areadjusted, each oi said heads provided with an arcuate slot and agraduated scale on its outer tace adj acent the slot, and each of saidholders provided with a pointer extending through a slot andassociatedWith a scale to indicate the adjustment oit' the holder.` l2. In adental articulator of that type including an oscillatory upper bow, anangularly and lengthwise adj ustable condyle shaft adapted to beconnected to and provide a pivot for said upper bow, a pair of standardseach provided with a head piece, a pair of holders adjustable on ahorizontal axis, each holder positioned against the. inner lace ot andsupported troni a head and carrying means for liXedly securing i t i nadjusted position, said holders extending diametrically of the .innerface elI said head, said sha ltts having globular ends extending intosaid holders, and a `pair of oppositely disposed adjusting memberscarried by each holder and having their inner ends abutting a globularend of said shait for angularly adjusting the latter when the membersare adjusted, said holders being' grooved for the rece )tion oi" theends ot' said shafts, each ot said adjusting ineinbers provided with aloch nut for locking it in set position, each of said heads providedwith an arcuate slot and a graduated scale on its outer tace adjacentthe slot, and each ot said holders provided with a pointer extendingthrough a slot and associated with a scale to indicate the adjustment ofthe holder.

18. In a dental articulator an upper bow provided at its rear with apair oi' oppositelv extending.tubular arms, condyle shaft sedtionsextending through said arms and fixed thereto, said shaft sectionsprojecting from said arms and adjustably connected at their inner ends,said shaft sections having their outer ends of globular forni, angularlyadjustable holders for supporting the outer ends of said sections, apairof oppositely extending adjusting members threadedly engaging` with saidholders and assomated with' the globular ends or the sections 'torangularly adjusting the latter and for maintaining the sections inadjusted position, stationary supporting means for said holders, andmeans abutting against the outer face of said supporting means forretaining said holders in adjusted position.

In testimony whereof, `Iafirt my signature hereto.

WILLIAM M. GAMBILL.

